Grok Module 7 Practice

Front

What one of these is a Float? True, 25, "10.8", 10.0

Back

10.0

Answer explanation

10.8 looks like a float but it is a string since it has double quotes around the number. The correct answer is 10.0

Front

Given the following: message = "I can learn hard things" Which index value will return the letter "e"?

Back

message[7]

Answer explanation

The index starts at zero and you include the spaces in the count. Therefore, "e" is located at index 7.

Front

Given the following:
message = "I can learn hard things"
What index will return the last letter in a message?

Back

message[-1]

Answer explanation

When you use a negative index it starts at the end of the message. So to access the last letter you back up one time and use message[-1]

Front

Given the following:
message = "I can learn hard things"
What index value is the same as message[-1]?

Back

message[len(message) - 1]

Answer explanation

The letter "s" is located at index 22. Don't forget the index starts at 0.

message[len(message) - 1] is the same as message[-1]. They both will access the last letter in the message.

The len(message) is 23. Therefore is you subtract one you get index 22.

Front

What letter is in name[4] for Ms. Allie Parham?

Back

A

Answer explanation

The index starts at 0 and you must count the symbols (the period) and the spaces. The correct answer when you do it this way is "A"

Front

How do you represent 15 in binary?

Back

1111

Answer explanation

Using column values. Add up each column that contains a 1. For example

8 4 2 1

---

1 0 1 0

This would give you 8+2 = 10 so the binary representation for 10 is 1010. Therefore to represent 15 you would need binary 1111 which gives you 8+4+2+1 = 15

Front

What is the decimal value for the binary number 1101?

Back

13

Answer explanation

To calculate the decimal value for the binary number 1101, use the column values

8 4 2 1

----------

1 1 0 1

You add the columns with a one:

8+4+1 = 13

Front

m = "Hello Allie"
What will print the first letter and the last letter?
Options:
print({m[0]}{m[-1]})
print({m[1]}{m[-1]})
print(f'{m[0]}{m[-1]}')
print(f'{m[0]}{m[-2]}')

Back

print(f'{m[0]}{m[-1]}')

Answer explanation

The correct syntax is:

print(f'{ }{ }')

Don't forget the "f"

The correct answer is:

print(f'{m[0]}{m[-1]}')

Front

If my_variable = "lunch", what is the data type of my_variable?

Back

string

Answer explanation

The variable 'my_variable' is assigned the value 'lunch', which is a sequence of characters enclosed in quotes. This indicates that its data type is a string, making 'string' the correct answer.

Front

What is the binary equivalent of the decimal number 7?

Back

111

Answer explanation

The decimal number 7 is represented in binary as 111. This is calculated by using the column values and adding all the columns with a 1 together. 4 + 2 + 1 = 7, which corresponds to the binary digits 111.